ANN ARBOR, Michigan—On Monday, the University of Michigan formally opened Mcity, a 32-acre outdoor research lab for testing out the future of automotive technology. Mcity simulates an urban environment for University of Michigan researchers, car makers, and technology suppliers so they can try out ideas in real-world conditions without the risks that would come on actual public streets. As it opened, we were on hand to see Mcity for ourselves and to experience some of the technology...